Regina Tarin is set to make her promotional debut at UFC Mexico City.
The young prospect has stepped in on three days’ notice to face Ernesta Kareckaite at Arena CDMX on Saturday.
They’ll meet in a 130lb catchweight contest after Kareckaite’s original opponent, Sofia Montenegro, fell off the card due to undisclosed reasons.
Tell us your expectations for UFC Mexico City. 🇲🇽
All you need to know about Regina Tarin
Regina Tarin is an exciting, undefeated prospect who fights out of Distrito Federal, Mexico.
The 7-0 flyweight is known for her aggressive finishing ability, especially on the feet.
Tarin’s perfect record is made up of five knockouts, two submissions, and one decision victory.
The UFC Mexico City star first solidified her status as a top-tier prospect by capturing the Budo Sento Championship women’s bantamweight title with a dominant fourth-round TKO win over Luisa Cifuentes in 2024.
Tarin’s momentum continued with a notable TKO victory over The Ultimate Fighter Season 30 veteran Kaytlin Neil. Most recently, Tarin displayed her devastating power by brutally knocking out Yurivia Jimenez with a perfectly timed overhand right at TNX 1125 in November 2025.
The 21-year-old got her ‘Kill Bill’ nickname after being underestimated by teammates and opponents.
Following her multi-day tryout at the WWE Performance Center in January 2026, Tarin confirmed on social media that she would continue pursuing MMA regardless of any interest from the world of professional wrestling.
Tarin already boasts 213,000 followers on Instagram—more than 28-bout UFC veteran Bobby Green, who will also compete on this weekend’s big fight card.
A win in her Octagon debut could see ‘Kill Bill’ become the next big MMA star out of Mexico.
Every fight at UFC Mexico City
Main Card
- Flyweight: Brandon Moreno vs. Lone’er Kavanagh
- Bantamweight: Marlon “Chito” Vera vs. David Martínez
- Lightweight: Daniel Zellhuber vs. King Green
- Flyweight: Édgar Cháirez vs. Felipe Bunes
- Flyweight: Imanol Rodriguez vs. Kevin Borjas
- Bantamweight: Santiago Luna vs. Angel Pacheco
Preliminary Card
- Middleweight: Ryan Gandra vs. José Daniel Medina
- Women’s Bantamweight: Ailín Pérez vs. Macy Chiasson
- Bantamweight: Cristian Quiñonez vs. Kris Moutinho
- Featherweight: Douglas Silva de Andrade vs. Javier Reyes
- Catchweight: Regina Tarin vs. Ernesta Kareckaitė
- Featherweight: Erik Silva vs. Francis Marshall
- Middleweight: Damian Pinas vs. Wesley Schultz
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